Hello fellow Goldwingers........ever had your dashlights come on when using your signal lights. Occasionally that would happen to my 92 aspencade. I would turn on one of my signal lights and the dash lights would come on and scare the crap out of me. Especially when I saw the oil light.In 5 seconds,the light would go out. Other times I would notice the battery monitor light on red and when I turned on one signal the light would go green.That would happen several times in one day.
Any thoughts

It's especially difficult to do when the problem is intermittent. Intermittent electrical problems really relegate diagnostics to more of "guessing."

I would run a new ground from a known good place (i.e. battery, frame) and sister it (connect it to) a ground that is suspicious - I would start with the ground wire for the turn signals. If that stops the intermittent problem, then that's the ground that is bad.

Finding just where the bad ground actually is can be even more difficult. Failing finding a pinched/broken wire or burned connector, sometimes it's next to impossible, and I just end up leaving the sistered ground wire in place to take the place of the bad ground.